... Metal Pall Ring 1.material: SS316, SS304, SS304L, etc 2 size:16mm,25mm,38mm,50mm,76mm >20 years professional manufactuer YIQUAN METAL PALL RINGMetal tower packing ... , so it is widely used in packing towers in petrochemical industry, chemical fertilizer industry and environmental protection, etc. Geometric ParametersSizes ... 304, 304L, 410,316, 316L. YIQUAN metal pall ring for petrochemical industry